Share your experience!
Tipo ingle sim. Can not hear tel convesation from opposite person off and on. Generally after 30 to 60 seconds. Tried Handsfree and Speaker. same problem. Curiously same sim wiorks on another handset AND another sim works on this handset! Network Vodafon in Bangalore.
What to do?
I suggest that you get a new SIM since you say it's working using other SIM cards in your Xperia tipo.
I have the same problem